package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.nio.file.Paths;
import java.util.UUID;

@RestController
@RequestMapping("/common")
public class CommonCtroller {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
        String originalFilename = file.getOriginalFilename();
        String subfix = originalFilename.substring(originalFilename.lastIndexOf("."));
        String filename = UUID.randomUUID()+subfix;
        File dir = new File(basePath);
        if(!dir.exists()){
            dir.mkdir();
        }
        try {
            file.transferTo(new File(basePath+filename));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(filename);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
        try {
            FileInputStream fileInputStream = new FileInputStream(basePath+name);
            ServletOutputStream outputStream = response.getOutputStream();
            byte[] bytes = new byte[1024];
            int len = 0;
            while((len = fileInputStream.read(bytes)) != -1){
                outputStream.write(bytes);
                outputStream.flush();
            }
            outputStream.close();
            fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
